Patent Model - Improvement in Packer for Packing Sand in Moulders' Flasks
Maker and role
Benjamin Benson (b.1817, d.1896), Patentee
Oct 13 1868
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19 1/2 x 5 1/2" (49.5 x 14cm)
Benson's invention consists in "a packer for packing sand in flasks, having a screw-thread on its perimeter, of diminishing pitch from its first end, and a fillet, of zinc or other soft metal, or alloy of metals, under it, said screw-thread terminating in a steel or hardened-metal end that is square, or nearly so, with the axis of the shaft or head on which it is placed." (Patent Number 83,029)
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